TW200427868A - Electric dischagre surface treating electrode, manufacture and evaluation methods thereof, electric dischagre surface treating device, and electric discharge treating method - Google Patents

Abstract

An electric discharge surface treating electrode (12) for electric discharge surface treating is formed by using a pressed power of pressed form of the powders from metal, metal compound or ceramic as electrode (12), and electric discharge is generated between the electrode (12) and a work (11), and then based on the discharged energy to deposit electrode material or reactant material from the electrode material by discharge energy on work surface to form a coating film (14), wherein, such electric discharge surface treating electrode(12) is characterized as the followings: powders with an average particle radium of 5 to 10 μm; containing the mixture of ingredients for forming coating(14) film on work(11) and 40 volume% ingredients hard to or not to form carbon compound; forming to have the hardness of B to 8B by pencil scratch test for coating film.

Description

200427868 D. Description of the invention [Technical field to which the invention belongs] The present invention relates to a pulse-shaped discharge between a discharge surface treatment electrode and a processed object formed by compacting a metal, metal compound, or ceramic powder compacted powder, and borrows From this discharge energy, an electrode for discharge surface treatment used in _discharge surface treatment for forming a film made of an electrode material or a material that reacts with the discharge energy due to discharge energy is formed on the surface of a processed object, and a manufacturing method and an evaluation method thereof. The present invention also relates to a discharge surface treatment apparatus and a discharge surface treatment method using the discharge surface treatment electrode. [Previous technology] For the surface treatment of gas turbine engines for aviation aircrafts w —— / ^ turbine blades and other surface treatments, because of the need to coat or thicken materials with strength and lubricity under high temperature environments For this reason, methods such as welding or flame spray coating have been used. Coatings made of materials known as Cr (chromium) or Mo (molybdenum), which are known to be oxidized under high temperature environments to become oxides, and exhibit lubricity by welding or flame spraying, are thickened for processing. (Hereinafter referred to as a workpiece). Here, welding refers to the method by which the material of the welding rod is fused and adhered to the workpiece by the discharge between the workpiece and the welding rod. The flame f coating refers to the state in which the metal material is melted and pressed. The method of spraying on a workpiece to form a coating. However, since any method of this welding or flame spraying requires manual work and requires proficiency, it is difficult to make the work process (Une), and the cost is high. In addition, especially welding, it is the method of pouring into the workpiece due to the concentration of heat 315550 6 200427868. When dealing with a thin thickness, or processing such as single crystal alloy or unidirectional solidified alloy = lcatlng all〇y ) And other directions control alloys and other fragile materials, such as alloys, are prone to welding cracking, and there is a problem of poor yield. As a technique for solving such a problem, a method of coating a surface of a mongolian material as a piece by discharge in a liquid is proposed. For example, it is disclosed in the first prior art that firstly, as a secondary process, an electrode material containing a coating material component to be formed on a guard is used in a coating solution, and other steel electrodes or graphite are used as a secondary process system. For electrodes that are not easily consumed, those who perform remelting discharge machining on electrode materials deposited on a workpiece (for example, refer to Patent Documents 丨). According to this document, it is possible to obtain a hard coating layer with good adhesion to the steel material itself. However, it is difficult to form a coating layer having a strong adhesive force on the surface of a sintered material such as a cemented carbide. In addition, in this method, a two-step process of a secondary process of forming a film and a secondary process of remelting and discharging the film to make close contact with a workpiece are required, so that the processing becomes complicated. In the second type of prior art, a technique for forming a hard ceramic coating on a metal surface without changing the electrical conditions under the electrode without changing the electrode under the two-stage processing to form a coating (for example, See Patent Document 2). In this second prior art, the ceramic powder which is to be used as an electrode is compression-molded at a pole pressure of 1 Ot / cm2 in such a manner as to achieve a theoretical density of 9 and used as an electrode after being calcined and sintered. In the third prior art, a material that forms a hard carbonized 7 315 550 material such as Ding (titanium) is used as an electrode, so that tailing occurs between the fish and the lightning, and the metal material of the date is a workpiece, that is, It is possible to form a firm hard coating without passing through the Dan / Crossing Spear King, which is required in the previous remelting and ft π brothers of the two previous technologies (for example, Examine Patent Document 3 ). This is for the benefit of ^ ^] using C (carbon) of the components in the electrode material toilet processing fluid consumed by the discharge. In addition, the phenomenon that Τ_Ή π μ generates TiC (titanium carbide), TiHj ^ titanium oxide, etc., Lei Xian, # 命 士 ό refined by the hydride of the genus powder powder pen, so that itself is the workpiece metal If a discharge occurs between the materials, it can be shaped = a hard quilt that is fast and has good adhesion when using metal materials such as Tl ^ Furthermore, the use of TlH2 and other chlorides mixed with other metals or ceramic powder compacts In addition, when electricity is generated between the metal material which is a workpiece and the hard film having various properties such as high hardness and abrasion resistance, it can be quickly formed. , X 'In the fourth kind of prior art towels, the osmium powder is compression-molded, and the sintering is used to produce a high-strength compact powder electrode. This electrode is used to form a hard material such as Tic by discharging the surface treatment. (For example, 'refer to patent document 4). As an example of the fourth prior art, a description will be given of a case of manufacturing a w discharge surface treatment electrode (hereinafter, simply referred to as an electrode) formed by mixing a powder of wc (tungsten carbide) and a powder of co (cobalt). / ❿6 Compressed powder formed by WC powder and Co powder and compression molding. It can be a mixture of WC powder and Co powder and compression molding, but it can be improved when waxing (~) is added to compression molding. It is more suitable because of its moldability. However, if a wax-based insulating substance is left in the electrode in a large amount, the resistance of the electrode will increase, and the discharge performance will deteriorate. Therefore, the wax needs to be removed. This wax can be removed by putting the pressed powder into a vacuum oven and heating it at $ 315550 200427868. At this time, if the heating temperature is too low, the wax cannot be removed, and when the temperature is too high, the wax becomes carbon shavings, which deteriorates the electrode purity. It is necessary to maintain the heating temperature above the temperature that can melt the wax and decompose the wax into carbon The temperature of the chips is below. Second, a high-frequency coil is used to heat the compacted powder in the vacuum furnace and sintered to a degree that imparts resistance to mechanical processing and does not cause excessive hardening, such as chalk. This firing is called preliminary sintering. At this time, the contact portions between the carbides will be combined with each other, but because the sintering temperature is low, the sintering temperature will not be reached, and the bonding is weak. If a high-strength electrode fired by such preliminary sintering is used to perform discharge surface treatment, a dense and homogeneous film can be formed on the surface of the workpiece. (Patent Literature 1) Japanese Patent Laid-Open No. 5-148615 (Patent Literature 2) Japanese Patent Laid-Open No. 8-300227 (Patent Literature 3) Japanese Patent Laid-Open No. 9-192937 (Patent Literature 4) International Publication No. 99/58744

Different question. It is also difficult to form a dense film. For one of the reasons for this difference, it may be indicated that the pressed powder can be made into a hard film which is desired by use. However, when the film is thick, the characteristics of the electrode are still large even in accordance with the fourth type, which may be caused by the difference in the material of the electrode 315550 9 200427868 & This is the difference in the particle size distribution of the powders produced by each electrode. Even if the electrodes are formed by pressing with the same press (ples ^) pressure, due to the relationship between the hardness of each electrode, the final There may be differences in electrode strength. X, among other reasons due to the differences in the electrode characteristics mentioned above, may be due to the change in the material of the film formed on the workpiece to make k of the electrode material (knife) implemented. This is because when the material of the electrode is changed, the strength of the electrode is different from the strength of the electrode before the change due to the difference in physical properties. Also, if you hunt thickly on the surface of the electric power to form a thick material, it is generally believed that the supply of material from the electrode side and the melting of the supplied material on the surface of the workpiece and the combination with the material of the workpiece have the best performance on the coating. influential. An indicator that has an influence on the supply of this electrode material is the hardness of the electrode. In the fourth advanced technology, the hardness of the electrode for discharge surface treatment is made into a strength that can withstand mechanical processing and is not too strong. The degree of hardness (for example, the degree of chalk). With such a hardness electrode, the supply of electrode material caused by the discharge can be suppressed, and the supplied material will be fully melted, so that a hard film can be formed on the surface of the jade. Also, "the hardness of the degree of chalk as an index of the hardness of the electrode for discharge surface treatment" is very vague. In addition, there is a problem that a difference is caused in a thick film formed on the surface of the workpiece due to the characteristics of the hardness and the like of the electrode. If «the material or size of the powder of the electrode is changed ', the molding conditions of the electrode will be different. Therefore, 'there is a need to change the electrode forming conditions multiple times according to the material of various electrodes to perform a film formation test' to determine the process that is suitable for the forming conditions of the electrode used for the discharge surface treatment of 315550 10 200427868 quality. That is, depending on the kind of material constituting the electrode, the molding conditions of the electrode required to form a good coating film are required, and therefore there is a problem that it takes time. Others "Even if the same material powder is used and the electrode is manufactured according to the same manufacturing method, the volume of the powder will change due to different seasons (temperature or humidity). It is still the same as the above material change, and it needs to be processed separately. In order to form a film and evaluate the electrodes, it was laborious. * Also, these previous discharge surface treatments mainly focused on the formation of hard coatings, especially the formation of hard f coatings near normal temperature, and the current situation is those who form hard coatings as the main component. In this method, ′ can only form a thin film of about IG / zm, and the thickness of the coating film cannot be more than 10 // m. The # ′ ratio is a proportion that contains more materials that are likely to form carbides. For example, if materials such as Ti are contained in electrodes, chemical reactions occur due to the discharge of electricity in the oil, and the coating becomes a hard carbide such as Tic (titanium carbide). With the progress of surface treatment, the material of the surface of the workpiece changes from steel (when the steel is treated) to Tic which is ceramic itself, which changes with the characteristics of heat conduction or melting point. However, according to experiments by the inventors, if a material that does not form carbides or is difficult to form carbides is added to the components of the electrode material, the phenomenon of thickening the film can be achieved. This is because the addition of a material that does not carbonize or is difficult to carbonize to the electrode will increase the number of materials that do not become carbides and remain metallic. It was also found that the selection of such electrode materials is of great significance for increasing the thickness of the coating 7. At the same time, the formed film has hardness, compactness and uniformity. However, the previous discharge surface treatment, as described in 315550 11 200427868 above, is mainly about the formation of coatings that can be produced at near normal temperature, such as Tr · r >, Tic or wc (tungsten carbide), etc., and about For example, the use of turbine blades of gas-filled full-engine engines for aviation and aircraft, etc., which are lubricating under high temperature environments and have a thick film (thick film with a thickness of 10Mm or higher), has not been emphasized. A problem that a film of such a thickness cannot be formed. In the second pre-S technology, the ceramic magnetic powder that will be the material constituting the electrode is compressed and formed in a high fortress force such as 10t / cm2 in such a way that it can become 50% to 90% of the theoretical density. Sintered electrodes. This is why Xianxian aims to form a thin, hard coating. The hardness of the electrode can make the formed quilt stronger. Because the main component of the material f is ceramic α, two ceramic powders that make up the electrode can be compressed. Waste force during molding, etc. ^. However, if you want to form a dense metal thick film by discharge surface treatment! The electrode manufactured by the method shown in the prior art of 帛 2 is used. This is because the metal powder is as shown in the second prior art; the high pressure pressure of 2 is used to make the electrode hard, so that the coating cannot be formed by the discharge surface treatment. If such an electrode is used to perform the discharge surface treatment, , It becomes the reason for the engraved electrical discharge machining of the cutting workpiece surface. That is, since ceramic powder is used in the second prior art, there is no problem when manufacturing the electrode for discharge surface treatment by pressing with high △ force as described above, but the conditions cannot be directly applied. No one has developed a method for manufacturing a discharge surface treatment electrode for a discharge surface treatment electrode made of metal powder to treat a private discharge surface to form a dense metal thick film. The present invention has been developed by the developer in view of the above-mentioned circumstances, and has as an object to produce a dense and thick discharge 315550 12 surface treatment electrode which can be easily formed on a processed object by a discharge surface treatment method. In addition, the purpose is to produce an electrode for surface treatment that can form a thick, lubricating film with high lubricity under a high temperature environment during surface treatment. And, in order to obtain a correct evaluation of the lightning discharge, it is possible to use the surface treatment electrode for the discharge surface treatment of the coating film formation < dry method. In addition, in order to obtain a metal surface, the metal powder can be used as a powder electrode for the discharge surface treatment, which will not decrease ^ ^ • stable discharge can be implemented below the surface "degree to deposit thick film discharge The surface is provided with a π return / treatment electrode for the purpose. Furthermore, the purpose is to obtain a discharge surface treatment device using itl · ^ ir- .. and other discharge surface treatment electrodes, and a method thereof. [Summary of the Invention] To achieve The above-mentioned object "the electrical system for the discharge surface treatment of the present invention uses a metal powder, a metal compound, or a ceramic powder as a compact" as an electrode, to cause a discharge to occur between the electrode and the processed object in a processing fluid or a substrate. With JL, the bismuth dendrite is used to form a coating on the surface of the aforementioned processed material, which is formed by the electrode material or the material that the electrode material reacts to due to the discharge of the enemy ’s electricity / discharge surface treatment. The electrode is characterized in that the powder has an average particle diameter of "0", and also contains a component that forms a film on the processed product, and does not carbide or is difficult to form with 4G vol% or more. This compound is formed by the θ J air knife, and is formed into a hardness in the U8B range according to the scratch test using two wrong pens. Secondly, the electrode for discharge surface treatment of the present invention is made of metal or A metal powder compacted powder compact is used as an electrode. During the processing of 315550 13 200427868 in liquid or gas, a discharge occurs between the electrode and the processed object, and an electrode is formed on the surface of the processed object by the discharge energy. The electrode or electrode is characterized in that the compressive strength of the aforementioned electrode is not more than 160 MPa. The electrode for discharge surface treatment of the present invention is a compacted powder compacted with electrode material which is a powder of a material belonging to or belongs to a chemical industry, and is used in a processing fluid or a gas, so that A discharge is generated between the electrode and the processed object through its discharge energy, and a film formed by the electrode material or a substance that the electrode material reacts with due to the discharge energy is formed on the surface of the processed object and is used as a discharge surface treatment discharge. The surface treatment electrode is characterized in that the volume ratio of the foregoing electrode material to the volume of the foregoing electrode is 25% to 65%. For example, the electrode for discharge surface treatment according to the present invention is a metal or A compacted powder compact of powder of a metal compound is used as an electrode, and a discharge occurs between the foregoing electrode and the processed object in a processing fluid or a gas, and an electrode material or electrode is formed on the surface of the processed object by the discharge energy. The electrode formed on the material port and reacted with the film formed therein is used as a discharge surface treatment electrode for discharge surface treatment, which is characterized in that the thermal conductivity is below the chest. In order to achieve the above-mentioned object, the method for manufacturing the discharge surface electrode according to the present invention is characterized by including a first step of pulverizing a metal, a metal compound, or a refined powder, and a method for pulverizing the pulverized powder as described above. The second step of sieving the powder aggregate into pieces below the distance between the electrodes 315550 14 200427868 Furthermore, in order to achieve the above purpose, the manufacturing method of the processing electrode of the present invention is metal, metal Compounds or ceramic compacted powders are used as electrodes in the processing fluid or gas to cause a discharge between the electrode and the guard, and the discharge energy is used to form the surface of the processed product. Electrode material or electrode material due to discharge :: The surface treatment method of the discharge film formed by the reacting substance, characterized by: * Heshu powder, with an average particle size of 彳 5 to 10 / im while: · 刖, on the processed product The composition of the film-forming component and a mixture of 40% by volume or more ^ a compound that is a slave compound or a component that is difficult to form a carbide, and is used lean: == the hardness of the scratch test can be in the range of: ^ electrode In order to form the aforementioned film, the second aspect is the discharge surface treatment method of the present invention, which uses a metal or metal compound powder compacted compact as the electrode, 5 | ★ ^ produced in the knife edge or milk body, the aforementioned electrode and processing Discharge occurs between objects, and the method of surface treatment of discharge is to form a film made of electrode material or a substance that reacts with the discharge energy of the electrode material on the surface of the aforementioned processed object. : Use an electrode with a compressive strength of 16 MPa or less to form the aforementioned film. Secondly, the "discharge surface treatment method of the present invention is a compacted powder body formed by compressing an electrode material that is a powder of a compound of type i or a compound of i type". As an electrode, a discharge occurs between the electrode and the processing fluid in a processing fluid or a gas, and the discharge energy is used to form a surface of the processed object with a discharge energy of 315550 15 or an electrode material. The reacting substance :: discharge surface treatment method is characterized by: ㈣: the volume ratio of the electrode volume is 25 to 65 Forming the film. All belong to: Two: The discharge surface treatment method of the present invention is based on metal or pressed powder body formed by "Do not powder powder" as the electrode, in the processing fluid ': body, between the Kos electrode and the processed object A pulse-like discharge will occur: the electrode material is formed on the surface of the aforementioned processed object by putting on this summer; "the discharge meter method of a film formed by a material that reacts with the discharge energy of the electrode material is characterized by: : The electrode with a thermal conductivity of i 0 W / mK or less is used to form the aforementioned film. 40% of the purpose of the present invention is related to the electrical discharge surface treatment of the present invention: the electrode is disposed in a processing fluid or a gas with a metal or metal Compounds or electrodes made of ceramic powders are formed by compaction of compacted powders, and processed products that will form coatings are described by electrically connecting the electrodes and the processed objects with a spoon or a diaper. A pulse-like discharge occurs between the electrode and the processed object, and the surface of the processed object is formed by the discharge energy of the electrode material or a substance that reacts due to the discharge of this x by the lightning-containing Ab densities at the mouth. Enveloped The discharge surface treatment farm is characterized in that the electrode is an average particle diameter of a mixture containing a component for forming a film on a processed product and a component of 40% by volume or more that does not form carbides or is difficult to form carbides. The powder of 5 to m is molded into a hardness in the range of B to 8B according to the pencil scratch test of the coating film. Secondly, the "discharge surface treatment device of the present invention" is in the processing fluid 315550 16 200427868: Or α + is equipped with an electrode made of M powder compressed and formed by powder of metal or metal compound, and plus n that will open the driver and pull the material through a power source that is electrically connected to the foregoing two + objects. In order to cause a pulse-shaped discharge between the electrodes f and the objects, the surface of the object can be processed by the discharge to form an electrode material or an electrode material due to the discharge. Here: a discharge surface treatment device of a film formed by the reacting material, which has special characteristics u is a special electrode, which has a compressive strength of 16 GMPa or less. = The discharge surface treatment device of the present invention is based on the processing fluid of the Shizizi *. :: and% L and the processed object that will form a film, and by the power supply device electrically connected to the aforementioned :::: said processed object, a pulse-shaped discharge occurs between the aforementioned electrical objects, and by this The discharge energy is one or two. The surface of the processed object forms a discharge surface treatment device formed by the electrode material or the electrode material due to the discharge of the material :: = = pole, which is made of the volume of the electrode. The volume ratio of the electrode material is 25 to 65%. 乂 It is related to the present invention. Ranben = Shizhong or the gas is equipped with a farming system in the processing fluid, and the powder is a secondary main compound. The electrode formed by the earth, and the processed product that will form the electrode and a +, act as a film, and the aforementioned electrode Γ :::: occurs between the aforementioned electrodes: front = electrically connected power supply device. A pulse-shaped discharge, and its discharge energy is used to form a surface of the processed object. The electrode at the discharge surface of the film formed by the electrode material or the electrode material is placed inside the substrate. The electrode has a heat conduction below mK. rate. 315550 17 200427868 In order to achieve the above-mentioned object, the method for evaluating the electrode for discharge surface treatment of the present invention uses a compacted powder compacted from a metal or a metal compound powder as an electrode in a processing fluid or a gas. A discharge is generated between the electrode and the processed object, and the discharge energy is used to form a film on the surface of the processed object made of an electrode material or a substance that reacts with the discharge energy due to the discharge energy. The discharge surface is used as a discharge surface treatment. An evaluation method of a processing electrode is characterized in that the electrode is slowly pressurized with a predetermined load, and based on the compressive strength of the electrode surface when cracks are about to occur, it is possible to evaluate whether the existing film can be formed on the surface of the object to be processed. . [Embodiment] In the following, the attached drawings are applied to the appropriate embodiments of the discharge surface treatment electrode, the manufacturing method and evaluation method of the discharge surface treatment electrode, the discharge surface treatment device, and the discharge surface treatment of the present invention. Explain in detail. Embodiment 1 First, the outline of the discharge surface treatment and the device used in the present invention will be described. Fig. 1 is a schematic diagram showing a discharge surface treatment in a discharge surface treatment apparatus. The discharge surface treatment apparatus 丨 includes: a workpiece (hereinafter, simply referred to as a workpiece) u to form a coating film 14; a discharge surface treatment electrode 12 for forming a coating film 14 on the surface of the workpiece 11; and an electrical connection to the workpiece The electrode 12 and the discharge surface treatment electrode 12 are constituted by a discharge surface treatment power source 13 that supplies a voltage to both to cause an arc discharge between them. For example, when the discharge surface treatment is performed in liquid, the part facing the workpiece 11 according to the workpiece 11 and the electrode for discharge surface treatment 315550 18 200427868 can be processed by oil, etc .; the method of night M ^ corpse ^ clothing / rain , And then set processing. For example, when the discharge surface treatment is performed in a gas, the following will be described: "The discharge surface treatment in the processing fluid will be exemplified < r month rise /. Also, in the following, there is a Ribe electrode. Furthermore, in the following 10. The discharge surface treatment electrode is referred to as τ relative to τ. The distance between the discharge surface treatment electrode 12 and the workpiece phase: the distance between the electrodes is called the inter-electrode distance. The discharge surface treatment device i Discharge surface treatment / Brother Ming M. For example, take the workpiece u to form the film 14 as the anode ', and shape the average particle diameter of gold to be the supply source of the film 14 from 10nm to several meters. The dry discharge surface treatment is done with t-pole 12: ... these electrodes are controlled by a control mechanism (not shown) in the processing fluid Η to control the distance between the poles so that the two The gate in causes a discharge between the discharge surface treatment electrode 12 and the workpiece u to melt one of the workpiece u and the electrode 12 due to the heat of the discharge. Here, the particles of the electrode 12 are bonded together. When the force is weak 1 due to explosive wind or electrostatic force caused by discharge A part of the fused electrode 12 (hereinafter referred to as electrode particles) 21, that is, estranged from the electrode 12 and moved privately toward the workpiece: ,,,, and 1 pole particle + 21 reaches the surface of the workpiece 11 and then coagulates J and becomes a coating 14. In addition, the distant electrode particles 21-part of the components in the processing fluid 15 or gas reacting with the wind knife 22 will also form a film 14 on the surface of the workpiece u. In this way, a film is formed on the surface of the workpiece u When the binding force between the powders of the electrode 12 and the electrode 12 is strong, the electrode 12 cannot be peeled off only by the discharge 315550 19 200427868 = explosive wind or electrostatic force, so that the electrode material cannot be supplied to the workpiece 11. The formation of a thick film by surface treatment is affected by the material supply from the electrode 12 side, the soldering of the supplied material on the workpiece surface, and the combination with the material of the workpiece n. Here, the supply of this electrode material will have The influencer is the degree of hardening of the electrode 12, that is, the hardness. This is explained by 'using an electrode for discharge surface treatment for discharge surface treatment = an example of a manufacturing method'. Figure 2 shows a discharge meter. Flow chart of the manufacturing process of the electrode for facial inflammation. First, crush the powder of metal or ceramics with components to form a coating on the workpiece. If it is made of multiple components, press Powders of various ingredients can be mixed and pulverized in a desired proportion. For example, using a pulverizer such as a ball mill, a spherical powder such as a metal or ceramic with an average particle size of 10 m in the market can be added. Crushing to an average particle size of 3 = :. Crushing can be performed in a liquid 'but at this time, the liquid is evaporated to powder (step S2). Because the dried powder, the powder and the powder are agglomerated to form a large block' In order to disintegrate this large piece, and to thoroughly mix the wax and powder used in the next process, it is sieved (step b 3). For example, when a ceramic ball or a mongolian ball is placed on the net of the powder that has been condensed into the page, and the powder is vibrated, the block formed by the condensation is the energy of the vibration, and it is the same as the ball. Immediately dissolve 'and pass through a mesh screen. The sieved powder can be used in the following steps. Here, the sieving operation of the powder crushed in step 3 will be described. Discharge surface treatment 'is applied to the discharge surface to generate a discharge 315550 20 200427868 Physical electrode 1 2 plate factory 11 ^ ΛΑ ^ Γ-

The voltage between "1" is usually in the range of 80V to 400V. If the voltage in this range is applied between the electrode 12 and the workpiece u, the distance between the electrode 12 and the workpiece u in the discharge surface treatment will be ^ The above-mentioned 'in the surface treatment of the discharge, the electrode 12 may be aggregated and formed into agglomerates due to the arc discharge generated between the poles', and may be separated from the electrode 12 as it is. Here, if it is agglomerated When the size is below the inter-electrode distance (0.3 mm or less), the next discharge can occur even when there is a block between the poles. Also, because the discharge occurs near the distance, there is an existence A discharge occurs at the block so that it may be broken into pieces due to the thermal energy or explosive force of the discharge. When the size of the block forming the electrode 12 is greater than the distance between the electrodes (0 · 3_ or more), the discharge is caused by the discharge. The block is detached from the electrode 12 as it is, so that it accumulates on the guard u, or floats between the electrodes filled with the working fluid 15 between the electrode 12 and the workpiece η. When the block is stacked in the former way, Discharge is the distance of the electrode workpiece u For nearby reasons, the discharge is concentrated in this part, but will not occur in other places, so that the film cannot be stacked on the surface of the workpiece. Moreover, because of this large block, the heat of discharge cannot be Completely refining. Because the film μ formed by the 4 dagger is very fragile and can be exploited by fingers. Also, as the latter method, when a large block floats between the electrodes, it causes a short circuit between the electrode 12 and the workpiece u, so that There is a discharge at month b. In other words, if a uniform discharge film * is to be obtained and a stable discharge is maintained, the powder constituting the electrode must not have a block larger than the distance between the electrodes due to powder aggregation. This This type of powder aggregation easily occurs in the case of metal powder or conductive ceramics, but not in the case of non-conductive 315550 21 200427868. Also, the smaller the average particle diameter at the right end, the more easily the powder aggregation occurs. Therefore , Λ In order to prevent the discharge meter caused by the agglomeration caused by the agglomeration of this kind of powder, the disadvantages in the field should be followed. It is necessary to add the powder agglomerated in step S3 to Follow the steps of the teacher. From the above conclusions, it can be seen that if sieving is implemented, μ is required and a mesh with a smaller size than the distance between the poles is used. After that, if you want to improve it after you take + When the pressurizing pressure in the powder is transmitted in the step, the waxes, such as paraffin, need to be introduced into the paraffin according to the weight ratio of about 1% to 10% (bovine (VStep S4)). For example, when powder is mixed with wax, although the formability can be improved, the surrounding area of Tian Fang and Shu Mi is covered with liquid again. 'It is condensed due to its intermolecular force or electrostatic force, so that it forms a large block.' In order to dissolve the agglomerated aggregate again, it is sieved (step S5). The sieving method here is the same as the method of step s3 described above. Next, the obtained powder is compression-pressed and molded (step S6). ). Fig. 3 is a cross-sectional view schematically showing a state of a molder when powder is molded. Insert the lower punch 1104 from the lower part of the hole formed in the metal mold (仏, town) 105, and fill the space formed by the lower punch 1G4 and the metal mold (town) 1 () 5_ through the above. The powder sieved in step S5 (when it is made of a plurality of ingredients, it is a powder mixture) 101. Then, the upper punch 103 was inserted from the upper part of the hole formed in the Monk k (i) i 05. Then, using a dispenser, pressure is applied from both sides of the upper punch 103 and the lower punch 104 of the former filled with the powder 101, and the powder 101 is compression-molded. Hereinafter, the compression-molded powder 101 is simply referred to as a compact. At this time, if the pressing pressure is increased, the electrode 102 becomes hard. If the pressing pressure is decreased, the electrode 102 is 315550 22 200427868, and the particle diameter of the powder 101 of the packing material is small. If the particle diameter of the powder 101 is large, the electrode 12 becomes soft. r 埶 Take out the pressed powder from the molding, use a vacuum furnace or nitrogen atmosphere: Force: Heat (steps are enough. During heating, if the heating temperature is increased, the electrode 12: If the heating temperature is reduced, the electrode 12 becomes soft. In addition, the resistance of the electrode 12 can be reduced due to the addition of urethane. Therefore, even if the molding is performed in step S4 and the compression molding is performed, the heating still has a combination of / * powders, and the result is: Electrode 12. Eight discharge surface treatments with electrical properties of V. In addition, 'if the pulverization step of step s 1 is omitted, that is, straight = average particle size tens of ... powder, or the step of step S3 is omitted. However, in the case of a large block of more than 0.3mm in Zhanwei, the bran: Cheng: discharge surface treatment electrode 12. However, the electrode 12 still has hardness such as slightly higher surface hardness and lower hardness in the center. In addition, due to ~ or Ni (antimony) which is difficult to oxidize, these alloys and powders with a uniform particle size of less than k 3 # m are mostly circulated on the market. If this powder is used, it can be omitted. The step of the above step §1 and the drying step of step S2. An embodiment of the electrode for discharge surface treatment made by the Shen method is described below. In the first embodiment, the electrode is formed, and the average particle diameter is 5 to 10 " The relationship between the ratio of carbide-forming materials, the hardness of the electrode, and the thickness of the film formed by the electrode will be explained. In this application note 1, 315550 23 200427868 that does not form carbide is changed. The electrode I for surface treatment of a component of a material that is difficult to form a carbide is tested as follows. The junction I of the electrode hardness and the thickness of the film formed on the processed product according to the discharge surface treatment method is shown below. The material of the substrate of the processing electrode is a powder of chromium carbide), and Co powder is added as a material that does not form carbides or is difficult to form carbides. The added C0 is between 0 and 80% by volume. The hardness of the tested electrode for discharge surface treatment was changed to a predetermined hardness described later. Here, the electrode system was changed from a Cqq powder having a particle size of 5 # m and a Co powder having a particle size of 5 # m. Produced according to the flow chart in Figure 2. However, in the step of pulverizing the powder in step S1, it is pulverized under the conditions that the powder with a particle size of 5 "can be obtained, and the step of mixing with wax in step S4 In the pressing step of step S6, the powder is compacted at a pressing pressure of about 100 MPa, and in the heating step of step S7, the powder is compressed at 40 (TC). Change the heating temperature to 80 (rc). Here, the heating temperature is the higher the proportion of CqC2 powder, the higher the preparation temperature, and the higher the proportion of C0, the lower the preparation temperature. This is because The proportion of Cr3c2 powder made by Yuri Mori is easy to become brittle. If it is heated at a lower temperature, it will collapse immediately. On the other hand, if the proportion of Co powder is large, the strength of the electrode is still easy to become stronger even if the heating temperature is low. Therefore. Here, the volume ratio (volume /%) used in the present specification means a ratio of a value obtained by dividing the materials to be mixed by the density of the materials. Specifically, 'if multiple materials are mixed' is the proportion of each volume itself, and if the material is an alloy, each material (metal element) contained in the alloy is divided by each density (specific gravity). The ratio of the values is taken as the volume ❶ /. . In other words, the volume 315550 24 200427868 ratio (body and%) 'refers to the value divided by the weight percentage of the target component by the initial and degree of its component, divided by the weight% of each component used in the electrode for surface treatment of discharge. The volume ratio (vol.%) Of the c0 powder in the mixture of the ChC2 powder and the Co powder in this example is divided by the value divided by the density of the components and the total value is expressed by the following formula.

Co% by weight

The volume% of Co = one _-down. _ ≪ 〇3 (: 2 by weight. / 〇 + co by weight 〇 / 〇,, 03 (32, the density of Co)> From this formula, we can know 'as the original density of the alloy mixed material phase The material that is close is of course slightly the same value as the weight%. Here, the discharge pulses and components during the discharge surface treatment of the first embodiment will be described. Figures 4A and 4B show the discharge surface treatment. An example of a discharge pulse condition. FIG. 4A shows the voltage waveform applied between the discharge surface treatment electrode and the workpiece during discharge, and FIG. 4b shows the current waveform of the current flowing to the discharge surface treatment device during discharge. As shown in Figure 4A, no-load voltage U1 is applied between the two poles at time t0, but at time t! After the discharge time lag td elapses, a current starts to flow between the two poles and the discharge starts. The voltage at this time is The discharge voltage, and the current flowing at this time is the peak current value ie. Then, if the supply of the voltage between the two poles is stopped at the moment h, the current will not flow, that is, the discharge will stop. Therefore, dagger ... Pulse width te. This voltage waveform engraved from tG to ^ is repeatedly applied between the two poles at rest time%. That is, as shown in FIG. 4A, the electrode working surface 2 25 315550 200427868 and the workpiece 11 In this example, a pulse-like voltage is applied. In this example, the discharge pulse conditions used in the surface treatment of the discharge are such that the peak current value ie =, the discharge duration, the duration (discharge pulse width) t, s, and the standstill Time t0 = 128 # s. Also, during the test, an electrode with an area of i5mmx i5mm was used to perform a discharge surface treatment on the workpiece 丨 $ minutes. Figure 5 shows that it is difficult to make carbide powder itself. A graph showing the relationship between the thickness of the film due to a change in the amount of Co in the discharge surface electrode produced by changing the amount of carbide-forming Co powder. In FIG. 5, the horizontal axis represents c contained in the discharge surface treatment electrode. The volume percentage, the vertical axis represents the thickness of the coating film formed on the processed object on a logarithmic scale bm) 〇 When the coating film is formed according to the above-mentioned discharge pulse conditions, it is formed by the volume% of Co contained in the manufactured electrode The thickness f of the film on the workpiece does not differ. In the fifth figure, 'indicates that if the content of c0 is less than 10% by volume, the thickness of the film is 10 ... The degree' gradually increases from the level of c0 to 30% by volume. Thickness "When the Co content exceeds about 40% by volume, the thickness will increase to 100,000 mm. This point will be discussed in more detail. For example, when a film is formed on a workpiece according to the above conditions, such as an electrode When the content of C is 0% by volume, that is, when the volume of ChC2 powder is 100% by volume, the thickness of the film that can form a film is its limit, and the thickness cannot be increased. Figure 6 shows the surface treatment for discharge. The case where the electrode does not contain a material that does not form a counter compound or a material that is difficult to form a carbide versus the processing time. In Fig. 6, the horizontal axis represents the processing time (minutes / cm2) of applying the discharge surface treatment per unit area of 315550 26 200427868, the vertical axis of the watch factory, and the position of the surface of the workpiece before performing the discharge surface processing as a reference. X Film thickness (surface position of workpiece) (# m). As shown in Fig. 6, in the initial stage of the surface treatment, the film will grow with time and increase electricity, but it is saturated somewhere (about 5 minutes / cm2). After that, the thickness of the film does not increase temporarily. However, if the discharge continues for more than a certain time (about 20 minutes / cm2), the thickness of the film begins to decrease, and the thickness of the film finally becomes negative *, and: Remove processing. However, even if it is removed under the condition of processing, there is still a film on the workpiece, and it has a degree of heart m ^. That is, the thickness of the film is almost equal to the appropriate t time (processing time: 20 minutes). / W) The processing state is the same. From this result, the processing time between 5 and 20 minutes is more appropriate. Looking back at Figure 5, it can be seen that the amount of Co in the electrode that is difficult to form can be started in the electrode. Thicken the film, as in the electrode. Human denier = 3. Volume% means that the thickness of the formed film begins to thicken and exceeds: :: to stabilize and easily form a thick film. "Although it is described as c in the figure 〇 == 〇Volume% began to increase the thickness of the film smoothly, but this record is advanced: D, the number is the average value of the test 'and in fact, such as c. When the content is about 30%, the coating will not thicken. 1. The strength of the film is still fragile, that is, it is easy to be treated as if it belongs to 丄 = factory, so that it cannot be stabilized. Therefore, it is preferable. . The content is increased in this way as a person who enters the film + dry film as a metal residue material, you can protect 3 non-carbide metal y 7 film, and Gu Yi stable terrain 315550 27 200427868 thick film. Fig. 7 shows a photograph of a coating film formed when an electrode having a Co content of 70% by volume is subjected to discharge surface treatment. This photograph illustrates the formation of a thick film, and shows that a thick film of about 2 mm is formed. The film is formed by the processing of the morin between the inside and the inside, but if the processing time is increased, a thicker film can be formed. In this way, if the electrode contains Co and other materials that are difficult to form carbides or do not form carbides, the electrode's volume% or more can be used to form thick and stable parts on the workpiece in accordance with the principle of the discharge meter. In the case of Example 4, Co is used as a material that is difficult to form carbides. "X-specifier" is also obtained when Ni, Fe (iron), selenium), Cu (copper), n (zinc), etc. are used. The same result. In addition, the “thick film” here refers to the inside of the tissue (the surface roughness of the outermost surface is not good due to the film formed by the pulsed discharge, and the appearance does not seem to have gloss). ,, I +, / 9 means a bifurcation. For example, such as

Materials such as Co, which are difficult to form carbides, have a low content of A. For example, if the electrode strength (hardness) is weakened, sometimes the attachment can be thickened. Dense film, such as eight ^., .. .. ^ ^ Meng slabs will be easy to remove when rubbed, this kind of fe is not a thick film referred to in the present invention. Similarly, due to the above patent The stack R ^ ^ mu ^ ^ s described in Document 1 etc. is not a dense coating, and it is easy to remove it by the friction of metal plates, etc., and for some reason, this coating is not It belongs to the so-called thick film of the present invention. In the above description, the case where the second # 〆H Ί Cr3C2 powder is compression-molded and heated by 315550 28 200427868 to make an electrode will be described, but sometimes the compression-molded compact is directly used. The powder is used as an electrode. However, in order to form a dense thick film, it is not appropriate to make it too hard or too soft, and appropriate hardness is required. Generally, heat treatment is required. The heating of the pressed powder is directly used for molding. Beneficial. The Au core is the hardness of the electrode, which is related to the electrode material. The binding strength of the powder is related to the supply of the electrode material to the workpiece side caused by the discharge. For example, when the electrode hardness is high, 'the discharge can still only release a small amount of lightning due to the strong combination of electrode materials. L " The electrode material in the heart is too large to be fully implemented. Conversely, if the electrode strength is low, the combination of electrode materials is weak = so 'a large amount of material is supplied when a discharge occurs, and when this amount is too much, = The material cannot be fully melted by the energy of the discharge pulse, so that a dense film cannot be formed. When using the same raw material with the same particle size, there is a factory power and heating temperature for the combination of electricity, that is, the electrode material. This real Nisaki r) is a compressive pressure of about 1 100 MPa, which is used as an example of the compressive pressure, 蚣 丄 #, if this pressure is increased, then = low = The same hardness can be obtained at the same temperature. On the contrary, if the force is reduced, the heating temperature should be set to a higher value. In the first embodiment, it is used as the discharge pulse condition during discharge surface treatment. Example For those who show the test results under different conditions, although the degree will be different, of course, under the other conditions, the same crop results can be obtained. As mentioned above, it can be seen that the material conditions for thick film formation are very different. It is important for 315550 29 200427868, but it is also known that other conditions are also very important in the surface treatment of discharge, especially in the formation of thick films. Generally, the electrode for discharge surface treatment follows the flowchart in Figure 2 above, and The powder material is compression-molded and heated to manufacture the electrode. At this time, the pressure of the compression molding and the heating temperature during the heat treatment are generally used to determine the state of the electrode. That is, the previous management of the electrode state was used to pressurize Predetermined conditions, such as pressure and heating temperature, are determined based on the shape of the electrode to form a film. However, this method requires the formation of a film for the management of the state of the electrodes, which is quite laborious. Then, the present inventors reviewed the resistance of the electrode as a management electrode, the bending test of the rubidium electrode, and (3) the method of testing the hardness of the electrode '. The resistance of Baixian '(1) is a method in which the electrode for discharge surface treatment is fixed and the resistance is loaded. The resistance has a tendency that if the discharge surface =, the pole will be firmer and harder, so the consumption can be a good indication of the strength of the surface treatment of the discharge. Good is good, but it is easy to have deviations in the measurement. Due to the influence of the physical property value of ，, it will be different when different materials are used, and it is necessary to grasp the optimal value of different materials for different kinds of mothers, etc., and there are many problems. Next, the bending test of '(2) is a method of cutting the electrode for discharge surface treatment into a conventional shape and implementing a conventional method. This method fixes problems such as resistance. Do not have page deviation, it takes a lot of time to measure, and the final sound of (3) is intricate, and it has a more formal style. There is an electrode for the surface treatment of the discharge (mdenter). a The method of measuring the hardness according to the shape of the indentation. The method is to use a measuring tool such as a pencil to scratch or place the electrode for surface treatment and determine whether there is a flaw 315550 30 200427868. These three methods have a strong correlation with each other, but the simple method of measurement is to use the hardness test of (3) the wrong pen and other gauges to determine the state of the electrode for surface treatment of discharge. Suitable. Therefore, regarding the relationship between the hardness of the electrode and the properties of the film formed by the electrode, the following indicators used by Yukitsu here as the reference for the hardness of the electrode are described below, such as the particles of the powder constituting the electrode When the diameter is large and the electrode is soft, use the scratch test of the coating film in US K5600-5-4. If the particle size of the powder constituting the electrode is small and the electrode is hard, use Rockwell hardness (R0ckwell

Wdness). The specifications of JISK56〇5_4 described in Λ are originally used for the evaluation of coatings, but the evaluation of materials with low hardness is very suitable. Of course, the results of other hardness evaluation methods and the scratch test of this coating film with a pencil: The results can be converted into each other. Of course, other hardness evaluation methods can be used as indicators. , — 丨 w 丨 丨 Howling is very important. Depending on the experimental situation, such as Hou Qingcheng ’s other conditions, the hardness of the special electrode is also very important. The relationship between the thickness of the discharge surface treatment and the hardness of the discharge surface treatment electrode is taken as an example to describe the case of a discharge surface treatment electrode manufactured according to the volume ratio of Cr3C2 to Co. Fig. 8 is a graph showing the change in the hardness of the electrode for discharge surface treatment when the volume ratio of = C0 and the dove is changed. In Fig. 8, the "horizontal axis represents the degree of the electrode for discharge surface treatment measured by the hardness of the film stylus pen according to the evaluation of hardness", the harder it is to the left, and the softer it is to the right, the vertical axis is / 315550 3 200427868 Evaluation status of the thickness of the quilt formed by the treatment electrode. When this kind of evaluation test is performed, the discharge surface is imaginary, and the pulse pulses of the discharge used in this kind of treatment are the sound current value ie = 1 0A, the discharge duration, and the duration (discharge pulse time) # s, Rest time t 28 // ς. V 丄 In the evaluation test, an electrode with an area of 5 x 15 mm was used to form a coating. As shown in Figure 8 below, when the hardness of the electrode for surface treatment of this dual-layer surface treatment is 4β LB, the condition of the coating is abnormal and very good, and a thick thick layer is formed. Also, the hardness of the electrode for discharge surface treatment is B to =, and a good thick film can be formed. Alas, in this range, as the hardening, the formation speed of the seeds tends to be slow, and the hardness of the B degree, the formation will be quite difficult. If it is “hard”, it is impossible to form a thick layer: so that the hardness of the electrode for discharge surface treatment becomes hard, that is, the work is performed while the work is being performed. The hardness of the electrode used for processing can still form a good thick film, but if the analysis group finds that there is a tendency to gradually increase the voids in the film, further, the hardness of the electrode for discharge surface production is softer than 9B. 'The electrode components cannot be charged: the phenomenon of direct adhesion to the workpiece during smelting', and the coating becomes non-porous: (-). Here, the hardness of the above-mentioned discharge surface treatment electricity J and the hardness of the coating The relationship between states will vary depending on the amount of galvanic pulses used. 'If the appropriate discharge pulse conditions are used, the range in which a good film can be formed can be expanded. The inventors have confirmed that: The tendency is not due to the material that constitutes the electrode, but the electrode made from powder with an average particle size of $ to ^ // m. 315550 32 200427868 If this embodiment is adopted, too, Adding C0, Ni, Fe, 1, Cu, Zn, etc. to the material that constitutes the electrode for discharge surface treatment and AI r with powder with a diameter of 5 to 10 will not form a carbon material 40 ~ .... The material family of the material or the monthly accumulation product / 0 which is difficult to form carbides, and the degree of hardness can be R ρ ^ π m. The hardness of the lead test using lead reeds is between B and 8B. The hardness of 1 +,, and 7B is for Nishiki-made discharge surface treatment of Nishiki for thunder and decay ... and using this type of electrode for discharge surface treatment to continuously apply the discharge surface treatment, it becomes ® μ 4 田 了 〆, It has the effect of stably forming radon on the workpiece. If you use this type of electrode for surface treatment, it can replace the spraying method of Zhizhi or flame spraying, and can be used to rely on welding. Or the process of the flame breeding method is used to process. F Shi Xingxiong 2,% w eight packs of the electrode material, the end of the powder that constitutes the electrode, the strength of the mouth. 0. That is, if the bonding strength is strong, It is difficult for the powder to be released here because of the power of discharge. However, if the bonding strength is weak, then Easily released. Also, this type of bonding strength varies depending on the size of the powder constituting the electrode. For example, when the particle size of the powder constituting the electrode is large, the number of points where the powder in the electrode is bonded to each other decreases. The strength of the electrode is reduced, but the powder that constitutes the electrode ψ ☆ has a small particle size, and the number of dots in the electrode that are combined with each other increases. Therefore, can it be discharged due to discharge? Whether the electrode material is released from the electrode depends on the particle size of the powder. In the above embodiment 丨: In the case of powder with a γ of 5 to heart mm, use the wrong pen scratch test according to the coating film㈣ The hardness of B 纟 8B is the most suitable value. However, in the second embodiment, the hardness and coating thickness of the electrode when the particle size is 1 i 5 " m are added, and the strength is increased. . Note 315550 33 200427868. 'For example, alloy powder containing Co, Cr, Ni and other components in a predetermined ratio, such as L »4- ^ 々Atomize method or mill (such as powder can be 3 // m # (+ ^ Degree method) pulverization and mixing, in accordance with the flow chart of the ninth embodiment of the first embodiment to manufacture the electrode for discharge surface treatment. < In the mixing step of y'S 4 with wax, 2 to 3% by weight of wax is mixed. In the pressing step of step S6, when the clothing is used as an electrode at a pressure of about 100 MPa, The powder is compacted. In the heating step of the step, the heating temperature is set to 6 ° F. C to 800 ° C range. In addition, in the production of such an electrode, the heating step of step S7 can be omitted, the mixed powder can be compression-molded, and the obtained compact can be used as an electrode. In addition, the composition of the above-mentioned mouth Meng Huan is Cr 20% by weight, Ni 10% by weight, W (Crane) ^% by weight, and Co 55% by weight, and at this time, c0% by volume is 40% or more . Using the manufactured electrode to implement the electric pulse conditions of Wang Lishi on the surface of Fangwen Electric, the peak current value ie = ioa and the discharge duration (discharge pulse width) are shown in Figures 4A and 4B. te == 64 // s, quiescent time% = ΐ28 // s °, and the electrode with an area of 帛 15mm × 15mm is formed to form a film. As a result, although the electrode material is made of powder, it is possible to form a non-defective, good-quality film because the material is uniform and has no deviation due to the use of an alloy powder. Of course, when the powder of each material (here, Cr powder, Ni powder, w powder, and co powder) is mixed in an amount to achieve a predetermined composition, the same electrode can also be manufactured. However, there is a problem such as the mixing deviation of the powder, and the performance cannot be reduced slightly. 315550 34 200427868 In the above description, 20% by weight of Cr, 5% by weight of Ni, and 15% by weight of W were used. / 〇, the rest of the powdered material in the proportion of c0, but the powdery alloy composition is not limited to this, but can be, for example, Cr 25% by weight, Ni 100% by weight, w 7% by weight, the rest Alloys with a proportion of c0, or Mo 28% by weight, Cr 17% by weight, Si (silicon) 3% by weight, the rest being Co-based alloys, or Cr 15% by weight, Fe8% by weight, and the rest being Ni ratios Alloy, 21% by weight of Cr, 9% by weight of Mo. /. , Ta (new) 4% by weight, the rest are Ni-based alloys, or Crl9% by weight, 53% by weight, Mo 3% by weight, (Cd (pick) + Ta) 5% by weight, Ti 0.8% by weight , A1 0.6 weight. /. For alloys such as Fe in the balance, Co, Ni, Fe, Al, and Cu, which are elements that are difficult to form carbides, may be contained in an amount of 40% by volume or more. But 'because the alloy ratios are not the same, the hardness and other properties of the material will be different. The electrode moldability or the state of the film will be somewhat different. For example, when the hardness of the electrode material is hard, pressurized powder is used. It will be difficult to shape it. In addition, if the strength of the electrode is increased by heat treatment, it is necessary to increase the heating temperature. For example, Cr 25% by weight, Nim 10% by weight, w7% by weight, and the rest are ratios of C0 are alloys, while Mo 28% by weight, Cr 17% by weight, si 3% by weight, and the rest The alloy with a proportion of Co is a harder material, but in the heat treatment of the electrode required to give the electrode, the temperature of the latter needs to be set about 100 ° C higher than the former on average. The ease of formation of a thick film is as shown in the embodiment 丨, and it becomes easier as the metal contained in the film increases with age & Φ & Alloy powder for electrode composition 315550 35 ZUU ^ Z / b06

Materials & + M and Lu, Co, Ni P e, AI, c, n, which are materials that are difficult to form carbides, are more likely to form dense thick films. The material that forms a carbide with 1Γ1Γ of a material that does not form a carbon thick film. And ^ 40% by volume, it can be easily and stably formed. Because the sum of C0 of the energy shape h has been read by 50% by volume, it is preferable to form a thick film of sufficient thickness. In addition, even if it is difficult to form carbides of materials such as c0, Cr, h, ^, :: The materials mixed with =: alloy components will form carbides =: the film will contain one, ... Composition, while Co, Ni, Fe, A1 can form a dense thick film. The ratio of & at least in the middle = the case where it is alloyed with 2 elements of co, and it is found to be an electric film. When the ratio of 2 to 3 is more than 20% by volume, it is easy to form a material with a thickness ratio of ^, which is a material that will form carbides. 'However, if it is an active material such as Ti, it is a material that is more difficult to form carbides. That is, in the & f-moon shape, although it is easy to carbonize, the degree of easy carbonization is:

Some of them will become carbides, and some of them will become coatings. For example, when examining the results of the Cr of the rnw metal and the results of the film h, it can be considered that when forming a stirrup, the film must be left as metal in the film, and there is more than employment. The ratio of the existing materials is per body. The relationship between the hardness of the electrode and the thickness of the film when the electrode made from the particle size i to 5 " powder, and 315550 36 200427868 is not formed is investigated as follows. Here, if the powder with a particle size of 6 to 71 is used to manufacture the electrode guard, the above-mentioned JISK56〇〇_5_4 # €, 1 ^ ^ ^ ΚΛ. Coating lead for coating film减 Scratch reduction test, but if the electrode with a particle size smaller than Ij is used to make the electrode, j is not applicable to this test. Therefore, in this example, an index of hardness H10 (M00 × hh) obtained from the pressure when the steel ball is pressed by a pressure of 15 kgf ^ distance h (" ηι) is used. As a result, the hardness of the electrode between 25 and 35 strokes can make the thickness of the coating more dense. However, even if it deviates from its range, there is still a range that can form a thick film. The hard direction is A thick film can be formed up to a degree of hardness of 2%, and a thick film can be formed up to a hardness of about 20 degrees in a soft direction. However, as the hardness increases, the squeak of the film formation tends to slow down, However, at a degree of hardness of 50, it is difficult to form a thick film. If the hardness is increased, a thick film cannot be formed, and as the hardness increases, the removal process on the workpiece side will begin. Also, in soft In the direction, the thickness is up to 20 degrees, although a thick film can be formed, but there is a tendency to increase the amount of unmelted materials. If the electrode is softer than 2G, you can find that the electrode is: directly attached to the electrode before it is fully melted. The phenomenon on the workpiece side. Here, the hardness of this electrode and The relationship of the state of the film 'will vary to some extent due to the use of the discharge pulse stopper. If appropriate discharge pulse conditions are used, the range in which a good film can be formed can also be expanded by some privacy. Μ In addition, as in this The particle size of the powder in the second embodiment is in the range of 0 to 5 m.) 'The hard sound of an appropriate electrode on the discharge surface treatment will also increase.' For the coating film of JISK56〇_5_4 shown in the embodiment and i 315550 37 200427868 pencil scratch test is difficult to determine. Therefore, here, the Rockwell hardness /. ¾ / σ hardness test is used to determine the hardness from the shape of the indentation by pressing the ball under a predetermined load. If the load is too heavy, it will cause the electrode to be damaged, and it is necessary to make the appropriate strength. Hardness test, other still have Vickers hardness test (Vicker, shardness test), etc., of course, can be used to measure the hardness of the electrode, but in this case there are problems such as the end of the repeated marks will be difficult to observe, so the shape of the indenter is still Spherical ones are preferred. :: Using this embodiment 2 ', from a material containing no carbides or a material that is difficult to form carbides to 40% by volume or more, the average particle diameter of the pole powder is 1 $ SA and wind power_ # m of powder , It is made on the electrode of Raben electric surface treatment so that the hardness can be 20 to 50, and the lightning electrode is used to perform the discharge surface treatment, and the film is coated. In order to form a dense and thick surface on the surface of the workpiece, Embodiment 3 A made the powder of the same material as that of Embodiment 2 into an average 丨 ... to make an electrode. Although it is the same material, " click η * l As the particle size of the powder is reduced, it is possible to obtain a suitable electrode hardness for surface treatment. In this case: 4: A material that can form a carbide or a material that is difficult to form a carbide is 40% by volume or more ', and a thick film can be easily formed. Cremated

In this moon shape, the electrode has a hardness of 30 to a degree of hardness, and it can form a dense and exaggerated U range. There is still a wide range that can form a thick film. Around, the hard direction can form a thick film up to the hardness, and the direction of Wang Younian can form a thick film up to 25 裎 sound Xi Xi Fen helmet. However, the hardness of n is & $ 日 阿, the formation speed of the coating is 315550 38 200427868: factory: the tendency is reversed, but at a hardness of 60 degrees, thick films are difficult. If the hardness is further increased, a thick film cannot be formed, and as the hardness = plus', it becomes a removal guard on the side of the workpiece to be removed. Also, in the soft direction and the hardness up to the material level, although a thick film can be formed, there is a tendency of "unmelted" and "sa". If the electrode is softer than 25 degrees, it can be found that the emperor domain is not very molten. The phenomenon that the bottom directly adheres to the workpiece side. In -2: The relationship between the T-pole hardness and the state of the film will vary slightly depending on the discharge device used. If a proper discharge pulse condition is used, then = =: The extent to which a good film can be formed is enlarged. Regarding the results: The same material was obtained for electrodes made of powders less than 1 V m. Γ was used in this embodiment 3 from a material containing no carbides. Second: a material that forms stone reactants. 40 Vol% or more, and make a powder with an average particle size of 1 = powder, make the electrode for surface treatment of discharge in such a way that the hardness can decay to 60, and use this electricity to apply the surface treatment of discharge Forms a dense and thick film on the surface of the workpiece. fAppearance Bear 4 In the fourth embodiment, an electrode for discharge surface treatment capable of thickening a film formed on a workpiece by a discharge surface treatment method will be described. First, the change in hardness due to the particle size of the electrode for the surface treatment of the discharge will be described. In the adding step of step% of the flow chart in FIG. 2, when the powder is molded, the force is transferred from the powder contacting the dusting surface or the mold surface to the inside of the electrode. At this time, the powder is slightly fine. 3J5550 39 200427868

Japan's movement Λ &, if the average particle diameter of the powder is about tens of // m: two: the space formed between the powder and the powder will increase, and the surface of the The powder (of the electrode surface), which moves privately in such a way as to fill its empty space, the particle density existing on the electrode surface will increase, and the friction will increase. That is to say, the force against the surface of the electrode can be maintained: the reaction force of stem pressure, so that the pressure will not be transmitted to the inside of the electrode. This is why a distribution of hardness is formed in the electrode. If such a discharge surface treatment electrode having a hardness distribution is used for actual treatment, it will be in one of the following two states. In the first type, the outer peripheral part of the series electrode has the most suitable hardness, while the inner part is too soft. In this case, it is possible to deposit a coating on the guard on the outer periphery of the electrode, but it is not possible to form a coating on the workpiece or to form a loose coating on the inside of the guard. The second type is a case where the outer peripheral portion is too hard and the inner portion is soft. In this case, since the outer periphery of the cymbal does not consume electrodes during the discharge surface treatment, it is a removal process, but a loose film is formed on the workpiece inside. In addition, in the case where the outer peripheral portion of the electrode is too hard to be removed from the surface of the workpiece, although the inner portion of the electrode is consumed, but the outer peripheral portion is not consumed, the surface on the electrode discharge side will have a protruding shape on the outer peripheral portion, and Most discharges will occur in the outer periphery. If this happens, the concentration of the discharge is likely to occur, and the discharge may become unstable. In these cases, the surface treatment of the discharge is not suitable. Then, the hardness of the electrode for discharge surface treatment and the formation of the film using the powder having a small particle diameter were tested. Here, only an alloy powder having an average particle diameter of 1 · 2 // m is used, and an electrode for discharge surface treatment having a shape of $ 〇 315550 40 200427868 x 11 mmx 5 · 5mm is manufactured according to the procedure shown in FIG. 2. The alloy powder used at this time is an alloy of 25 wt% Cr, Ni 1 Owt%, W 7 wt%, C 0. 5 wt%, and the rest being Co proportions. In addition to alloy powders of this composition, Mo 28wt%, Cr 17wt%, Si 3wt〇 / 〇, alloys with the remaining Co ratio, or Cr 28wt%, Ni 5wt%, W 19wt%, and the rest can be used. Co alloys and the like. Here, in the pressing step of step S6 in FIG. 2, the powder is compression-molded at a pressure of 67 MPa, and in order to obtain electrodes having different hardnesses, in the heating step of step S7, a pressure of 73 0 is used. ° C and 75 0 ° C, use a vacuum furnace to heat the pressed powder for one hour. First, the hardness of various electrodes manufactured by changing the heating temperature was studied. Here, in the fourth embodiment, the compressive strength of the electrode is used as the hardness of the electrode. Fig. 9 is a photograph showing the outline of an experimental device for measuring the compressive strength of an electrode. The experimental device in Fig. 9 increases the force applied to the electrode at a rate of 1N per second, and the load cell on the upper part of the electrode is used to measure the force applied to the electrode. If a certain force is reached, the load on the electrode surface will be released due to cracks on the electrode surface, and the compressive strength of the electrode will be calculated from the force at the time of the crack. As a result, the shrinkage strength of the electrode heated at 73 ° C was 100 MPa, and the compressive strength of the electrode heated at 7500 ° C was 180 MPa. Next, the compression of the electrode manufactured from the alloy powder was performed. The relationship between intensity and film thickness will be explained. The discharge surface treatment conditions at this time are based on the peak current value of 10A, and the discharge duration (discharge pulse width) as 315550 41 200427868 into 4 yi / S. A graph showing the pressure-relief wall of the electrode that is subjected to a discharge surface treatment under the above conditions & The compressive strength of the electrode (MPa), the vertical axis represents the thickness (mm) of the coating film formed on the surface of the workpiece when the surface treatment electrode for discharge surface is treated with the compressive strength that loosened the loose axis. Z is longer than the vertical axis The thickness of the coating film is a small value, which indicates that the removal process of the surface of the workpiece that is being cut by a snow table will not be formed. Shikou is also shown in the figure. If the compression strength of the electrode for processing is 1 MPa, On the artifact The solid yoke is stacked on the surface. If the compressive strength is i 80 MPa, it will be removed from the surface. In particular, when forming a film with a thickness of 0.2 mm on the workpiece, the compressive strength of the electrode needs to be Below 100 MPa. In addition, 'If the current peak or the discharge time increases, only the amount of electrode powder supplied from the electrode is increased, and the power of the electrode to strip the electrode powder will not increase. # 'τ μ ,, the same results as in Fig. 11 under the conditions of Bata processing. Compressing the powder to form the electrode and producing ^ α i The discharge compressive strength of the electrode for surface treatment can be determined per unit. The number of particles and particles combined in the physical volume, volume, and volume is determined. If the average particle size is increased by 3 蚪, the number of particles combined per unit volume will decrease by one, so the compression The strength will decrease. That is, it means that as long as the average particle size is the same, ^ Mw a — 乂 If the crushing strength is made below a certain value that can form a thick film, then any material can be used to form a thick film. For example, About this The electrode hardness applicator Wan Shico% Nikko 'found that the use of alloy powder with an average particle size of about 1 "m in the powder electrode dip + spoon discharge surface treatment, as an indicator of the appropriate 315550 42 200427868 film formation electrode evaluation It is necessary to manage the compressive strength of 100 MPa or less. However, the compressive strength of this pointer, which is one of the electrode evaluations that can form a thick film, will not change even if the material is changed as long as the average particle size is the same. However, the change In the case of materials, it is necessary to change the molding conditions such as heating temperature or pressurization pressure on the electrode manufacturing. As explained in 5 above, it is confirmed that one of the main factors that can determine whether a thick film can be formed by discharge surface treatment is the electrode. hardness. That is, when using a powder having an average particle size of ❸i " m, the pressure or heating temperature during compression molding is changed, and the discharge surface treatment electrode manufactured in such a manner that the compressive strength can be 100 MPa or less is used for discharging. Surface treatment can form a thick film on the workpiece. The force due to the discharge will act as a sliding door electrode powder, and the range of this force is from the heart to 0 mm. That is, f must be able to measure the strength of the electrode m with this level of size. For this reason, the compression of the overall hardness of the electrode can be grasped. If the particle size of the electrode powder is small, even the force is heated. Manufacture of electrodes at temperature, although the number of units per unit increases, although the number of units per unit is reduced; the surface bound by the particles of Gantian a, the nucleus ..., the particles and the surrounding particles will not change, but the total binding electrode contained in the unit volume Will harden. As a matter of fact, in recent years, due to the advancement of powder molding technology, metal particles or ceramic powders with an average particle size of 10 nm to 兖 have been used. At 0, experiments were carried out using a powder with an average particle size of 50 mm to produce a compressive strength disc # where the discharge meter diode was used. In addition, if 315550 43 200427868 is used to produce electrodes with powders with an average particle size in the nanometer level, since the electrodes with sufficient strength can be produced only by pressing, the heating step of step S7 in FIG. 2 can be omitted. In this example, the heating step is omitted. In addition, the pulse conditions of the discharge using the surface treatment of the discharge under the manufactured electrode were performed under the same conditions as those shown in Fig. 10 above. As a result of the experiment, it was confirmed that if the compressive strength is lower than 160 MPa, although the target is stacked and processed on the surface of the workpiece, when the compressive strength is higher than this, it will become the processing of removing the surface of the workpiece. Here, if the electrode strength of Ni powder with an average particle diameter of 50 nm is examined, it has been found that, in the discharge surface treatment of a pressed powder electrode using Ni powder, moss is required as one of the indicators for proper electrode evaluation for film formation. The physical strength of the pressure-preserving device is such that it can be less than 160 MPa.

As described above, the compressive strength j of an electrode produced by powder compression molding is determined by the number of particles and particle combinations per unit volume. If the average particle size becomes smaller, the number of particles and particle combinations per unit volume will increase, and the compressive strength will increase. As described above, it has been found that, in the discharge surface treatment of a compacted powder electrode using an average particle diameter of 50 nmi, it is necessary to manage the compressive strength of 16 GMPa or less as one of the indicators for appropriate electrode evaluation for film formation. This kind of development, if combined with the results of the case where the average particle size is 1.2 / zm, is a table-as the average particle size is different, the shrinkage f of the electrode that can form a thick film is also different. In addition, as a suitable electrode for film formation evaluation, the value of the compressive strength of the pointer does not differ depending on the material of the electrode material as long as the average particle diameter is the same. Therefore, if it is judged whether the discharge meter is made of powder with a small average particle size of 315550 44 200427868 ^ whether the electrode for processing can accumulate a thick film, then

Its compressive strength can be increased. T J

As for other electrode materials in Co, 1 is used as the other electrode material. As a result of using an average particle size of 3 ㈣, it is found that ㈣ = Μ shrinkage strength, which is about 5 Saki & In this case, it was also confirmed that: ... the main reason for forming a thick film by the surface treatment of the discharge is "the hardness of the electrode". That is, it is confirmed that if a powder having an average particle diameter is used, the compression molding is changed. Pressure or heating temperature to produce an electrode with a pressure of 50 MPa or less, and when the electrode is used to perform a discharge surface treatment, a thick film can be formed on the surface of the workpiece. In this case, the powder I was produced by shrink molding The compressive strength f of the electrode is determined by the number of particles and particle combinations per unit volume. 'The value of the pressure as a pointer of a suitable electrode evaluation for film formation', as long as it is the average particle diameter The same 'system does not differ according to the material of the electric material. Therefore, if it is judged whether the electrode for discharge surface treatment made of a powder with a large average particle size can deposit a thick film, it is necessary to make its compressive strength. On the other hand, Figure 11 is a graph showing the relationship between the average particle size and the compressive strength of an electrode capable of depositing a thick film. In the figure, the horizontal axis represents the discharge on a logarithmic scale. The average particle diameter of the powder for surface treatment electrode (// 111), and 22 represents the compressive strength of the electrode that can form a coating on the surface of the workpiece. The compressive strength increases with increasing stacking. S ^ If this embodiment 4 is adopted, a powder having an average particle size of 1 vm is used as a raw material 315550 45 200427868, and the compressive strength can be manufactured below i MPa. The discharge surface treatment electrode is subjected to discharge surface treatment, which can form a dense thick film having lubricity under high temperature environment on the surface. When the powder has an average particle diameter of 50 nm, the compression strength can be i60 MPa. The following method ... When the average particle size is 3 " claw powder, it is made in such a way that the shrinkage strength can be less than 50MPa; students may use φ master engineer m Guangxin Naiba w discharge surface treatment electrode, and use

The discharge surface treatment electrode is subjected to discharge surface treatment, that is, a dense thick film having lubricity under high temperature environment can be formed on the workpiece. In addition, when using the fourth embodiment of the present invention to manufacture a discharge surface treatment electrode for discharge surface treatment, the compressive strength can be used to determine whether a thick film can be deposited on the workpiece. This can also be applied to the discharge of the surface treatment of the electrode under the same conditions-the same time the mass production of the electrode. Specifically, it is the measurement result of the pseudo-strength of a plurality of electrodes extracted from the same amount of electricity produced at the same time: the evaluator of the electrodes produced at the same time. Therefore, even when the electrode is large, the quality of all electricity can be managed. The discharge surface treatment of each individual does not reduce the discharge of the two-single electrode with a low surface roughness. The discharge surface of the two-thick film with two thick coatings can be discharged, as described in 1 to 3. For example, when a thick film is formed on the second and second surfaces by discharge surface treatment, a material that does not form carbides or a material that is difficult to form carbides is required: Conditions on top-grade materials + addition of carbon only ^ 315550 46 200427868 or difficult to form; when the material of δ reactant is in the electrode, there will be residual holes in the upper surface of the workpiece / formed into a medium-thick film, making it difficult to form a dense film. Therefore, in the fifth embodiment, a technique required to form a thick film and a dense film will be described. ^ Here, Co-based alloys (hereinafter referred to as "co alloys") containing 30% of Cr, 3% of Ni, 2% of Mo, 2% of W, and 5% of Fe 3/0 will be described as examples. Such Co alloy powder is a commercially available product. In addition, the alloy C0 contains Cr 25. /. , Ni 10%, W 7%, such as Co-based alloys, or alloys containing Cr25%, Ni10%, W7%, etc., based on C0 ^ Contains 0% 20%, Sichuan 10%, ^ 5 % And so on. Alloys and the like which are base materials Three. As long as it contains Co as a base material, it is sufficient. See the steps in Figure 7 above to fabricate electrodes for discharge surface treatment. At this time, it is best to add the force in the pressurizing step in the step% to 93 to 280 MPa. When the force is high, the hardness of the electrode will be biased, or gas will be generated on the electrode Crack (air crack). If the discharge surface treatment electrode made of Cg alloy powder manufactured according to the above formula is used to perform lightning discharge, the surface of the workpiece will be formed with a coating of gold. However, from the experiments conducted by Mao Ming and others, it was found that the proportion of the powder of the electrode material in the performance of the coating has a great influence. Since the electrode system is made of powder material by i-shrink molding, it has a state of having a lot of space. If there are too many gates, β +, and work, the strength of the electrode will be reduced. The positive pulse f-will not be supplied by the discharge pulse, and the supply of electrode material will occur due to the impact of the discharge. For example, Γ # and the electrode collapse in a wide range. On the other hand, 315550 47 200427868 In the case of “too little space,” the electrodes are too tightly connected, and the supply of electrode materials by the discharge pulse is reduced, so that a thick film cannot be formed.粉末 The powder with a particle size of 3 # m used here is made by crushing a powder with a particle size of several tens of millimeters, and the particle size distribution is a powder with a distribution of 3 // m as a peak. For example, when this type of powder I with a substantially uniform diameter of t diameter is shrink-formed to manufacture an electrode, according to the inventors' practice, etc. === the proportion of the electrode volume of the electrode that can form a good coating = the product ratio (the rest is Space), in the range of 25% to 50%. However, hereinafter, the ratio of electrode materials is 25 /. %, As an electrode, it is quite ^ r;., Sultry and has a salty feeling of insufficient strength. On the contrary, if the ratio of the electrode material reaches the upper limit U / 〇4, as the electrode, t, "", although the mesh is hard and part of the gas crack may occur. The cause of the situation caused by the proportion of the volume of the σ electrode material Electricity is shown in Table 1. The general situation of "..." shows the ratio of this ratio, which will vary due to powder particles, for example, using 4; ^ eighty-two knife cloth 4 and how much space ratio (, 0 Ray: In the case of powder, there is a ratio of the volume of the electrode material of the electrode)% Conversely, if a powder with a narrow particle size distribution is used, it tends to be low. The phase rate tends to increase. Shou, there is room for the electrode 315550 48 200427868 Table 1 Proportion of volume of electrode material 15% of the state of the coating The electrode collapses and cannot be used 20% Although it can form a coating, it is in a relaxed state 25% Although it is porous, it can still form a thick film 30% Can form a dense 40% of the thick film can form a dense thick film 50% Although it can form a dense thick film, the film formation is slow. 55% The removal process of the workpiece prevents the formation of a thick film. On the other hand, if the particle size is different When powder is mixed, For example, when powders with a particle size of about 6 // m are used in the particle size of 3 // m used in the above example, the ratio of the volume of the electrode material to the electrode volume of the electrode that can form a good film is 40 to 65% range. However, when the electrode material volume ratio is 40%, the electrode is relatively soft and has insufficient strength. On the contrary, if the electrode material volume ratio is 65%, the electrode material is used as an electrode. In other words, it is a very hard person. The outline of the state of the coating caused by the proportion of the volume of the electrode material in this case is shown in Table 2. Table 2 The proportion of the volume of the electrode material is 30% of the state of the coating. The electrode cannot be collapsed. Although the use of 35% can form a film, the relaxed state of 40% is porous, but still can form a thick film 50% can form a dense thick film 60% can form a dense thick film 65%, although it can form a dense Thick film, but the formation of the film is slow. 70% of the workpiece is removed so that a thick film cannot be formed. If this embodiment 5 is adopted, the volume ratio of the electrode volume to the electrode volume due to the use of the electrode material is considered. The discharge surface treatment electrode is applied in accordance with 49 315550 200427868 discharge surface treatment. 'Even if the discharge surface treatment electrode is manufactured using metal powder as a raw material, it can form a dense, non-cavity coating on the workpiece.' In the above-mentioned Patent Document 2, there is a record that an electrode that can be formed by compression molding to 50% to 90% of the theoretical density is used for a ceramic electrode that can be formed at an extremely high pressure, but it is not the same as this embodiment Those who form a thick film of dense metal also have different technical scopes and uses. The effect is different. Embodiment 6 In this embodiment 6, the electrode for discharge surface treatment manufactured by compression molding of metal powder is used. The discharge surface treatment capable of depositing a thick film will be described.

In the electrode for discharge surface treatment manufactured by the process shown in FIG. 2, if the combination of the powder and the powder is strong, the heat transfer between the powders proceeds smoothly, that is, the thermal conductivity increases. On the contrary, if the combination is weak, Temple, the heat transfer between the powders will not proceed smoothly 'with a decrease in thermal conductivity. If the heating temperature is increased, the combination of powder and powder metal progresses, and the heat transfer rate of the electrode increases. Conversely, if the heating temperature is lowered, the powder-to-powder combination will not progress, and the electrode's thermal conductivity will decrease. When the thermal conductivity (energy per unit length and unit temperature) is low, ’is due to the localized high temperature, so the heat of discharge can be borrowed == the material vaporizes in an instant. With this explosive force, the "square" or "electrode" of the electrode is accumulated on the surface of the guard. On the other hand, when the heat transfer rate of the electrode is high, it is difficult to diffuse the heat due to heat 315550 50 200427868 to generate heat spots, so that the electrode material does not vaporize. Therefore, no explosive force occurs, so that the electrode material cannot be supplied. It can be seen that when a thick film is formed on the surface of the piece, f should deposit more electrode material on the king piece than the material that constitutes the material: For this reason, the thermal conductivity of the electrode for discharge surface treatment needs to be lower . In the following, a method for reducing the thermal conductivity of the electrode for discharge surface treatment will be described. In accordance with the process of Fig. 2, only the alloy powder with an average particle size " heart " was used to produce a discharge surface treatment electrode having a shape of 50 mmxu_x5 5_. The alloy powder used at this time is Cr25wt%, Ni

Si 3wt /. The rest are alloys with a proportion of c0 or & μ% Wt%, Ni5wt%, W19% by weight. The rest are alloys with a proportion of c0. Moreover, in the pressing step of step S6 in the figure: the powder is molded at a pressure of 67, X, in order to obtain electrodes with different hardness, in the heating step of step S7, at 73 (TC And the temperature of 750t, in a vacuum furnace: heating and pressing the powder for 1 hour ... discharge surface treatment is performed under the same discharge pulse conditions as in Embodiment 4. "First, the heat conduction of each electrode manufactured by changing the heating temperature The rate was investigated according to the Laser flash method. As a result, the thermal conductivity of the electrode heated below was 10 w / mK, and the thermal conductivity of the electrode heated at 75 ° was 12 W / mK. i〇wt%, W7wt%, C05wt% 'all other alloys in the proportion of c0. In addition to alloy powder of this composition' M can also be used. 28%, Cr Figure 12 shows the use of different thermal conductivity 315550 51 200427868 film thickness on the surface of the workpiece and the thermal conductivity of the lightning electrode used for the discharge surface treatment when the discharge surface treatment electrode is subjected to discharge surface treatment for 5 minutes. Dry glaze table not discharge meter The thermal conductivity (W / mK) of the processing electrode. The ^ axis indicates the thickness of the coating surface (mm) formed on the surface of the workpiece when the discharge electrode is subjected to a discharge surface treatment using a discharge surface with a thermal conductivity indicated by the inspection axis. ). Here, if the value of the film thickness on the vertical axis is negative, it means to remove the processing., 1 * Bu Tongshen ·-Return to weight, when the processing time is the same, the thermal conductivity

The lower the film thickness, the thicker it will be. In addition, when the thermal conductivity of the electrode is about n.8W / mK or more, ′ M will be a removal additive for removing the surface of the workpiece. Therefore, when a thick film is formed from solid hair, the thermal conductivity of the electrode needs to be iUW / mK or less. In particular, when a film having a thickness of 0.2 mm or more is to be used, 'the thermal conductivity of the electrode is required to be 1 QW / mK or less. " After the surface treatment of the discharge, if you observe the surface of the discharge surface treated electrode with a thermal conductivity of 12w / mK, you can confirm that the powder of the electrode is melted, and the metal is broken. luster. In other words, the surface on which the discharge occurs is not a compacted body in which the powders are slightly combined with each other, but a re-solidified body formed by the adhesion of the metal powder to each other. On the other hand, in the state of the discharge-treated surface of the t-pole for discharge surface treatment with a heat transfer V rate of 10 W / mK, gloss was not observed. In this way, when the thermal conductivity is above 〇0w / mK, because the hot spots are not formed on the electrode, and the part where the electrode is in contact with the arc column is not gasified, the explosive force becomes small and cannot be completely removed. The molten domains formed on the electrode remain on the electrode surface. In addition, due to the repeated discharge of the discharge and the accumulation in the toad field, a molten and re-solidified metal layer was formed on the electrode surface. If such a metal layer is formed, there is no longer an electrode that migrates from the electrode to the workpiece 52 315550 200427868 powder 'and becomes a removal process to remove the surface of the workpiece. Eight private individuals in the sixth form of this book, the situation of the composition of the above-mentioned Meng and Qin Dynasty will be explained ^ Brothers, but Co alloy powder, Ni alloy powder or Fe alloy powder The Lord

In the same manner, an electrode having a thermal conductivity of 10 W / mK or less is manufactured in the same manner, and a thick film is formed using this electrode. "The surface treatment of the discharge can also be the I powder that is formed by the powder house shrinking, and it will not work.) The thermal conductivity of the electrode is not the material of the ray}, but the powder and powder- 'For all materials, if the electrode is manufactured with the following thermal conductivity (1 please ~ κ), a thick film can be formed on the workpiece. For example, even if Cu (approximately 300w / mK) or A1 (2〇) with good thermal conductivity is used. 〇W / mK) 'As long as the thermal conductivity of the electrode made from its powder can meet the above-mentioned thermal conductivity (delete mK), it can form a thick film on the surface of the workpiece, but if its thermal conductivity is the above-mentioned thermal conductivity In the above case, it is not possible to form a coating on the workpiece. From this sixth embodiment, it has been experimentally proven that if an electrode having a 埶 conductivity below 10 · K is used, a thick coating can be formed, and its value has been proven to be used as Usefulness for forming indicators required for electrodes on thick coatings. In this way, if the thermal conductivity is used as an indicator for the electrodes, it is easy to estimate the benefits of forming electrodes with full coating (month). In addition, regarding discharge Electrode for processing Regarding conductivity, Japanese Patent Application Laid-Open No. Sho 54-124806 describes the method of making the heat transfer of the electrode ^ ^ 0.5 KCal / cm.sec, C or less. However, Japanese Patent Laid-Open No. Sho 54-124806 The described invention is to avoid the consumption of the electrode. 315550 53 200427868 Electro-processing of the electrical surface and adding the electrode shape to H for the purpose of “Releaser”, not for the purpose of the present invention to form a film on the workpiece. Electrode…… In Japanese Patent Laid-Open No. Sho 5heart 248248, although there is no record of the lower limit of thermal conductivity, it is clear that # reduce the thermal conductivity of the electrode (for example, 1QW / mK) In this case, it is impossible to achieve the purpose of electric discharge machining such as forming hot spots on the electrode, consuming electricity #, and copying the processed shape. That is, the discharge surface treatment for forming a film on the workpiece with active electrode consumption as in the sixth embodiment. The way ... is completely the same as the method of "the same person." In addition, the value of this 0.5 Kcal / cm · sec · t (= 2 093〇3w ~ k) is very large. The value of pure copper with the highest thermal conductivity is 3980 W / mK. many. According to the sixth embodiment, since a discharge surface treatment electrode with a thermal conductivity of-is used to perform the discharge surface treatment, _, even if the electrode for discharge surface treatment is manufactured using metal powder as a raw material, it can still be on the workpiece. Form the original coating. _ As explained above, according to the present invention, according to the particle size of the powder, the hardness of the electrode for discharge surface treatment, its compressive strength, the ratio of the volume of the electrode material to its volume, and its thermal conductivity can be in accordance with the established It can be manufactured in a manner within the range, and its electrode can be used to perform the discharge surface treatment, so that it can form a dense thick film on the workpiece. fShixing Bear 7 In the seventh embodiment, as the electrode evaluation method, the discharge is actually continuously generated according to the predetermined conditions, from the electrode consumption, processing time, and 315550 54 200427868. The advantages and disadvantages are explained. The alloy powder shown in Embodiment 4 (those pulverized to an average particle size of 12 #) was [molded] to produce a discharge surface treatment electrode having a shape of 50_xn_x5. The manufacturing process of this electrode is the same as that of the fourth embodiment. The electrode thus manufactured is manufactured under the control of the particle size of the powder and the manufacturing conditions. However, the powder may be pulverized due to the difference in temperature and humidity during manufacture. , The mixed state of wax and powder, and so on. In the above j ', it is a method of managing such deviations by using electrode hardness, etc. In addition to this method, it is also possible to directly use an electrode to form a film for investigation. " Figures 13A to 13C are diagrams for explaining the outline of a method for judging whether electricity is good or bad by a film formation test. In these figures, the same constituent elements as those used in the first figure of Embodiment 1 are attached with the same symbols; ϋ Here, these figures are diagrams for explaining the outline of the determination method, Components such as a power source and a drive shaft are omitted and not shown. In this embodiment, the electrode evaluation method of 7 uses an electrode manufactured as described above to form a coating by a predetermined amount of discharge surface treatment. In the case of the above electrodes, from the viewpoint of the simplicity of processing, it is best to set it in such a way that the surface of llmmx 5.5mm can become the discharge surface, but it can also be set in such a way that other surfaces can become the discharge surface. First, as shown in FIG. I3A, the positioning work between the battery 12 and the work U is performed. Next, as shown in Fig. 3β, "the discharge is started" to form a film. Alas, as shown in Fig. Nc, a film 4 will be formed on the workpiece 11. In Figs. 13B and 13C, reference numeral 17 denotes an arcing column for discharge. Here, the distance driven by the electrode 12 in the downward direction of the 315550 55 200427868 z-axis in the figure was maintained at a predetermined value, and the thickness of the film and the film formed were measured. Here, the pushing amount in the z-axis direction is 2 mm. Because the electrode is pushed in the z-axis direction. For the sake of the bandit, the amount of electrode / shaft dryness (length) after the formation is 2 coffee + (thickness of the formed film) + (gap). The discharge gap is several tens to several degrees. In addition, the conditions of the surface treatment of the discharge are such that the peak current value ie = 10A, the discharge time (discharge pulse time), ... are made. Table 3 shows the results of the actual film formation test. table 3

In Table 3, electrode number 2 = film formation time indicates the discharge surface treatment time, film thickness indicates: = thickness of the film formed in time, and tensile strength indicates that the reading test piece was formed by adhering to the workpiece u. On the film ------- J__yj.jy_ 20-sheet strength testing machine will adhere to the guard and the film on the test only 4% tensile and the pressure of the film rupture. The formation time of the electrode system coating of electrode No. 1 is 16 minutes, and the thickness of the Roche :: Coating is. · 35_ 'and the electrode numbers NO · 3 and 4 are slightly two. Time gate ... When comparing the pole number such as · 1, the formation of the membrane is 20 minutes longer than the length of the car, but it is itchy ^ — 户 料度 “. F pole number No ο 5 ρ, on the contrary, the membrane is formed The time is 13 minutes shorter, and the coating 315550 56 200427868 ^ degrees becomes .. 30-. From then on, the processing time of these electrodes is longer or shorter than normal (16 minutes). The intensity is not dependent on the processing time or can form The thickness of the coating: = to 'can be optimal' will depend on the electrode material, electrode shape, :::! This type of coating can be implemented according to the established conditions " Huai coating material degree, to judge the quality of the electrode. The positive and negative 1% of the average processing time = the base 4 can be set as an example. Those who are in the inferior way in this range can be set as the good judgment, and can be separated from: 'The thickness of the coating can also be made in the same way. For example, the system described in the test The tester can be applied with the electrode pushing amount as ^, I value, but it can also be made with the processing time as the predetermined time and the positive and negative values of the average film thickness = 2 μ m ^ + as the good judgment. As a disadvantage The method is set. If the embodiment 7 ′ is adopted, the film formation time or film thickness when the film is formed on the workpiece with the conditions set by the electrode 2 can be used to determine the quality of the electrode. (Industrial use possibility) As above The present invention is suitable for a discharge surface treatment apparatus capable of automating the process of forming a thick film on the surface of a workpiece. [Brief description of the drawings] FIG. 1 is a diagram showing the outline of the discharge surface treatment in the discharge surface treatment apparatus. Figure 2 is a flow chart showing the manufacturing process of the electrode for surface treatment of discharge, 315550 57 200427868 Figure 3 is a cross-sectional view schematically showing the state of the molder when the powder is molded, and Figure 4A is a diagram showing the state applied to the electrode during discharge. Figure 4B shows the waveform of the voltage between the electrode and the workpiece for discharge surface treatment. Figure 4B shows the current waveform of the current flowing to the discharge surface treatment device during discharge. Figure 5 shows the change of c for mixing Cr2 and C2 powders. A graph showing the relationship between the thickness of the film due to the change in the amount of Co on the electrode for surface treatment of discharge produced by the amount of powder, and Fig. 6 shows the discharge surface. The physical electrode does not contain a material that does not form a counter compound or a material that is difficult to form a carbide. Figure 7 shows the formation of a coating on the processing time. Figure 7: Use of an electrode with a C0 content of 70% by volume for the discharge surface Photograph of the film formed during processing. Figure 8 shows the state of thick film formation when the hardness of the electrode for discharge surface treatment is changed by the volume ratio of C% 30% to Co 70%. Figure 9 shows the measurement Photograph of the outline of the experimental device for the compression measurement of the electrode. Figure 10 shows the relationship between the compressive strength of the electrode and the thickness of the coating. Figure 11 shows the difference between the average particle size and the compressive strength of the electrode that can be deposited on the coating. Fig. 12 shows the thickness of the film formed on the surface of the workpiece during discharge treatment with the electrode with a different thermal conductivity. The thermal conductivity of the electrode used for electrical surface treatment is not shown. 315550 200427868 Figure 1A is a schematic diagram showing the method of judging the quality of the electrode according to the film formation test. Figure 1B is a diagram showing the method of judging the quality of the electrode by the film formation test. The schematic diagram of the method, Figure 1 3C is a schematic diagram showing the method of judging the quality of the electrode according to the film formation test. (Description of the element symbol) 11 Workpiece 12 Electrode for discharge surface treatment 13 Power source for discharge surface treatment 14 Coating 15 Processing Liquid 16 Processing tank 21 Electrode particles 22 Components in gas 24 Respondents in gas 101 Powder 103 Upper punch 104 Lower punch 105 Metal mold (105) 59 315550

Claims (1)

200427868 The scope of patent application: 1. An electrode for discharge surface treatment, which uses metal, metal compound or ceramic powder compacted powder as the electrode, to make the electrode and the processed object in the processing fluid or in the air. Discharge occurs between them, and the surface of the processed object is formed with a film made of an electrode material or a substance that reacts with the discharge energy due to the discharge energy. The discharge surface treatment is used for the discharge surface treatment. The electrode is characterized in that the powder has an average particle diameter of 5 to 10 # m, and contains a component for forming a film on a processed object, and 40% by volume or more of which does not form carbides or is difficult to form carbides. The hardness of the mixture of ingredients can be adjusted to a hardness in the range of B to 8B by a pencil scratch test with a coating film. 2. A type of t-electrode for discharge surface treatment, which uses a metal powder, a metal compound or a ceramic powder compacted body as an electrode, to cause a discharge between the foregoing electrode and the processed object in a processing fluid or a gas, by The discharge energy is L, and the surface of the processed object is formed with a film made of an electrode material or a substance that reacts with the discharge energy due to the discharge energy. The discharge surface treatment electrode used for the discharge surface treatment is characterized by: month; Powder, which has an average particle diameter of 1 to 5 # m, and contains a mixture of ingredients that form a film on the user side and the processed object, and a mixture of 40% by volume or more of a component that does not form a carbide or is difficult to form a carbide, and The hardness obtained when the indentation distance when the 1 / 4-inch steel ball is pressed under a pressure of 15 kgf is hUm) is obtained. The hardness can be a hardness in the range of 20 to 50 in the range of H = 100 to 100. . 60 315550 200427868 3. An electrode for discharge surface treatment, which uses a compacted body of metal, metal compound or ceramic powder as the electrode, to 'discharge between the aforementioned electrode and the processed object in the working fluid or gas, The discharge surface treatment electrode is formed by the discharge energy, and the surface of the processed object forms a film made of an electrode material or a substance that reacts with the discharge energy due to the discharge energy. The discharge surface treatment electrode is used as a discharge surface treatment. The above-mentioned powder has a mean particle diameter of # m or less, and contains a mixture of a component for forming a film on a processed product and a component of 40% by volume or more that does not form carbides or is difficult to form carbides, and It is formed into an indentation when pressed with a 1 / 4-inch steel ball under a pressure of 15 kgf. The hardness obtained as h (// m) at can be 25 to 60. Range of hardness. 4. An electrode for double electric surface treatment, which uses a powder compacted by metal or metal compound as an electrode, and discharges between the 刖 j electrode and the workpiece in the processing liquid or gas, and discharges the electrode. Energy =! The surface of the processed object is formed by the electrode material or the electrode material reacts with the ::: and the film formed by the reacting material is used for the discharge surface treatment of the discharge surface treatment electrode, which is characterized by: ^ the compressive strength of the electrode , A 1 6GMPa or less. The processing electrode is a metal powder or a metallized material, which is an electrode material that is compression-molded as an electrode. In the 2 body, a discharge occurs between the foregoing electrode and the processed object. Respond to discharge energy: 315550 61 200427868 The electrode used for the discharge surface treatment of the film is a discharge surface treatment electrode, characterized in that the volume ratio of the electrode material to the volume of the foregoing electrode is 25% to 65%. 6. 8. An electrode for discharge surface treatment is a powder of metal or a metal compound [, a compacted compact powder as an electrode, and a discharge occurs between the foregoing electrode and the processed object in a processing fluid or a gas, and The discharge surface treatment electrode formed by the discharge energy and forming a film made of an electrode material or a substance that reacts with the discharge energy due to the discharge energy on the surface of another processed object is a discharge surface treatment electrode characterized by a thermal conductivity of 1 〇W / mK or less. A method for manufacturing an electrode for discharge surface treatment, comprising: a first step of pulverizing a powder of a metal, a metal compound, or a ceramic; and decomposing the pulverized powder into aggregates to a distance below an inter-electrode distance. The second step of sieving by size, and the third step of forming the sieved powder into a predetermined shape and compression molding at a pressure of 93 to 278 MPa. A discharge surface treatment method that uses metal, metal compound or ceramic powder to be compressed into a compacted powder as an electrode, and discharges between the foregoing electrode and the processed object in a processing liquid towel or gas, and uses the discharge energy And the surface of the aforementioned processed object is formed with an electrode material or an electrode material: a discharge surface treatment method of a film formed by a substance that reacts with discharge energy, which is characterized by: 315550 62 200427868 Introduce powder, with 5 to 1 〇 # m The mean particle size is also mixed with a component for forming a film on a processed object and a component of 4G% by volume or more that does not form a carbonized material or is difficult to form a carbide, and is scratched with a pencil using a coating film The hardness of the test can be formed into electrical properties in a manner of B to around to form the aforementioned film. 9 ·: A kind of discharge surface treatment method, which uses metal, metal compound or pressed powder formed by ceramic powder as the electrode, in the processing fluid or gas: so that: a discharge occurs between the electrode and the processed object, by which Discharge energy: And on the surface of the processed object, a discharge surface treatment method of forming a film made of an electrode material or a substance that is reacted by the discharge energy due to the discharge energy, is characterized in that the powder has an average particle size of ljL5 # m. At the same time ^ a component used to form a film on a processed product, and a mixture of 40% by volume or more: a component that will form carbides or components that are difficult to form carbides, "type 2 is when a 1/4 inch steel ball is pressed at a pressure of 15kgf ==: from the hardness obtained at the time Η = ι〇〇_ι〇〇〇χ ":. '20 to 50 range of hardness of the electrode to form the aforementioned quilt: end :: molding powder As an electrode, a discharge occurs in the processing fluid or gas, and the discharge occurs between the electrode and the processed object, and the discharge is caused by the discharge: Electricity II. The surface of the processed object forms a film made of the electrode material or the electrode material itself and ΓΓΓ reacting substance. Discharge surface treatment / 友 '有 4 寸 征 ... 3] 5550 63 month powder, which has an average particle size of 1 # m or less, contains ingredients for forming a film on a processed object, and does not form above vol% The hardness obtained when carbide or a mixture of components that are difficult to form carbide is formed by using i, 4, and i to press i / 4 inch steel ball under the pressure of i 5 as h (# m) ⑼Zhongyue b becomes an electrode with a hardness in the range of 25 to 60 to form the aforementioned coating 0 11. Beta discharge I surface treatment methods, which use a compacted powder of metal or metal compound powder as the electrode, are being processed In liquid or gas, a discharge occurs between the front f electrode and the processed object, and the discharge energy is used to form a discharge on the surface of the second processed object, which is a film formed by the electrode material or a substance that the electrode material reacts with due to the discharge energy. The surface treatment method is characterized by: using an electrode with a compressive strength of # 160MPa or less to form the aforementioned coating. 12. A discharge surface treatment method is to compress the electrode material with a powder made of metal or a metal compound. As an electrode, a type of diffused powder is used to add a discharge between the electrode and the processed object in liquid or gas, and its electric energy is formed on the surface of the processed object. The surface treatment method for the discharge surface of the electrode material caused by the material reacted by the thunder discharge station at 10 U, and is characterized in that: the volume ratio of the electrode material to the foregoing electrode volume is 25% to 65% 13 · A discharge surface treatment method, using metal or metal compound powder, 315550 64 200427868 waste finely formed powder as the second, +. As the electrode, in the processing fluid or gas , So that a pulse-like discharge occurs between the described electrode and the processed object in your disaster area, and by its discharge moon dagger, on the table of the foregoing processed object. Due to the lightning furnace c ', the electrode material or electrode The discharge surface treatment method of the film formed by the material contained in the material Fenggan dagger is characterized by the following characteristics: · The officials use electrodes with a thermal conductivity below I0W / mK to form the top 14 discharge surface treatments. a _ and 糸 are arranged in the processing liquid or the gas, and the metal powder or the metal compound or the powder of the ceramic powder is formed by a historical powder electrode, and a processed product that forms a film. The power supply device is electrically connected to the object, so that a pulse-shaped discharge occurs between the foregoing electrode and the object: and the discharge energy is used to form an electrode material or electrode material due to the discharge energy on the surface of other processed objects. The characteristics of the discharge surface treatment of the film formed by the reacted substance are as follows: 电极 The electrode contains a component for forming a film on a processed object and a component that does not form carbides or is difficult to form carbides at 40% by volume or more. The average powder of the mixture of 5 to 10 # m is molded in such a manner that the hardness can be in the range of B to 8B according to the pencil scratch test of the coating film. & K-type electric discharge surface treatment device is an electrode formed by compacting a metal, a metal compound or a ceramic powder in a processing fluid or a gas, and a processed object forming a film, and The electrode and the processed object are electrically connected to the power supply device, so that a pulse-shaped discharge occurs between the electrode and the processed object of 315550 65, and the discharge energy is used to form an electrode on the surface of the processed object. The discharge surface treatment device of a film formed by a material or an electrode material that reacts due to discharge energy is characterized in that: "The above mentioned electric power" will contain a component for forming a film on a processed object and 40 volumes. /. When the average particle diameter of a mixture of the above components that do not form carbides or difficult to form carbides, 丨 to m, is molded into an indentation distance when i / 4 inch steel balls are pressed at a pressure of 15kgf as hU m) The obtained hardness H = 100_i × 00 × h can be a hardness ranging from 20 to 50. y types of discharge surface treatment devices are arranged in the process> in the night or in the gas, an electrode formed by compacting a metal, a metal compound, or a ceramic powder and a processed product forming a coating. The processing object is installed according to an electrically connected power source, so that a pulsed discharge occurs between the electrode and the processing object, and the discharge energy is used to form an electrode material or electrode material on the surface of the processing object. The discharge surface treatment device of a film formed by a substance that reacts with discharge energy is characterized in that the electrode just described "will contain a knife for forming a film on a processed product", and will not form carbonization at a thickness of more than 40 fins / °. The hardness of the powder obtained when the average particle diameter of a material or a mixture of components that are difficult to form carbides is less than or equal to ^, and is molded into a h (" m) when the indentation distance when a 1/4 忖 steel ball is pressed at a pressure of 15kgf is h h = hhm Static h can be a hardness in the range of 25 to 60. 315550 66 200427868 17. A discharge surface treatment device, which is arranged in the processing fluid or gas with an electrode made of a powder compacted by metal or a metal compound powder and a processed product forming a coating. The electrode and the processed object are electrically connected to a power supply device, so that a pulse-shaped discharge occurs between the electrode and the processed object, and an electrode material or electrode is formed on the surface of the processed object by the discharge energy. The discharge surface treatment device of a film formed by a material that reacts with discharge energy is characterized in that the rhyme electrode 'has a compressive strength of 160 MPa or less. 18 · —A discharge surface treatment device is provided in the processing liquid or gas with an electrode made of a powder compacted by compressing a metal or a metal compound powder and a processed object forming a film, and the electrode and the foregoing electrode and The processing object is electrically connected to the power supply device, so that a pulse-shaped discharge occurs between the electrode and the processing object, and the discharge energy is used to form an electrode material or an electrode material on the surface of the processing object due to the discharge month. The discharge surface treatment device of a film formed by a reactive substance is characterized in that the aforementioned electrode is a volume ratio of the aforementioned electrode material to the volume of the electrode, which is 25 to 65%. 19. · A discharge surface treatment device comprising an electrode made of a powder compacted by metal or metal compound powder compression in a processing fluid or a gas, and a processed object forming a film. The processed object is electrically connected to the power source device, so that a pulse-shaped discharge occurs between the electrode and the processed object, and by the discharge energy, 315550 67 200427868 is formed on the surface of the processed object by the electrode material or electrode material. The discharge surface treatment device of a film formed by a substance that reacts with discharge energy is characterized in that the electrode has a thermal conductivity of 10 W / mK or less. Φ 20. An evaluation method for an electrode for discharge surface treatment is to use a pressed powder compacted by powder of a metal or a metal compound as an electric # to discharge between the foregoing electrode and the processed object in a processing fluid or a gas, An evaluation method for forming an electrode for discharge surface treatment by forming a film made of an electrode material or a substance that reacts with the discharge energy due to the discharge energy on the surface of the aforesaid king by the discharge energy of the pot is characterized by: The pressure is applied under pressure to evaluate whether the electrode can form a predetermined film on the surface of the processed object based on the compressive strength at which the surface of the electrode is about to crack. . .- An evaluation method for an electrode for discharge surface treatment is to use a powder compact of metal or metal compound powder as an electrode to discharge between the foregoing electrode and the processed object in a processing fluid or a gas, and use the Discharge energy. On the surface of the previously known τ% main I ~, the surface of the workforce is formed with an electrode material or a substance that reacts with the discharge energy due to the discharge energy. The evaluation method for the electrode for discharge surface treatment is characterized by its characteristics. The reason is: the film formation time or film thickness when the film is jealously formed on the aforementioned processed object under the predetermined conditions by using the described electrode to determine the superiority of the former. 315 550 68